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Mail::SpamAssassin::PlUser:Contributed Perl Mail::SpamAssassin::Plugin::AWL(3)
NAME
Mail::SpamAssassin::Plugin::AWL - Normalize scores via auto-whitelist
SYNOPSIS
To try this out, add this or uncomment this line in init.pre:
loadplugin Mail::SpamAssassin::Plugin::AWL
Use the supplied 60_awl.cf file (ie you don't have to do anything) or
add these lines to a .cf file:
header AWL eval:check_from_in_auto_whitelist()
describe AWL From: address is in the auto white-list
tflags AWL userconf noautolearn
priority AWL 1000
DESCRIPTION
This plugin module provides support for the auto-whitelist. It keeps
track of the average SpamAssassin score for senders. Senders are
tracked using a combination of their From: address and their IP
address. It then uses that average score to reduce the variability in
scoring from message to message and modifies the final score by pushing
the result towards the historical average. This improves the accuracy
of filtering for most email.
TEMPLATE TAGS
This plugin module adds the following "tags" that can be used as place-
holders in certain options. See "Mail::SpamAssassin::Conf" for more
information on TEMPLATE TAGS.
_AWL_ AWL modifier
_AWLMEAN_ Mean score on which AWL modification is based
_AWLCOUNT_ Number of messages on which AWL modification is based
_AWLPRESCORE_ Score before AWL
USER PREFERENCES
The following options can be used in both site-wide ("local.cf") and
user-specific ("user_prefs") configuration files to customize how Spa-
mAssassin handles incoming email messages.
use_auto_whitelist ( 0 │ 1 ) (default: 1)
Whether to use auto-whitelists. Auto-whitelists track the long-
term average score for each sender and then shift the score of new
messages toward that long-term average. This can increase or
decrease the score for messages, depending on the long-term behav-
ior of the particular correspondent.
For more information about the auto-whitelist system, please look
at the the "Automatic Whitelist System" section of the README file.
The auto-whitelist is not intended as a general-purpose replacement
for static whitelist entries added to your config files.
Note that certain tests are ignored when determining the final mes-
sage score:
- rules with tflags set to 'noautolearn'
auto_whitelist_factor n (default: 0.5, range [0..1])
How much towards the long-term mean for the sender to regress a
message. Basically, the algorithm is to track the long-term mean
score of messages for the sender ("mean"), and then once we have
otherwise fully calculated the score for this message ("score"), we
calculate the final score for the message as:
"finalscore" = "score" + ("mean" - "score") * "factor"
So if "factor" = 0.5, then we'll move to half way between the cal-
culated score and the mean. If "factor" = 0.3, then we'll move
about 1/3 of the way from the score toward the mean. "factor" = 1
means just use the long-term mean; "factor" = 0 mean just use the
calculated score.
user_awl_sql_override_username
Used by the SQLBasedAddrList storage implementation.
If this option is set the SQLBasedAddrList module will override the
set username with the value given. This can be useful for imple-
menting global or group based auto-whitelist databases.
ADMINISTRATOR SETTINGS
These settings differ from the ones above, in that they are considered
'more privileged' -- even more than the ones in the PRIVILEGED SETTINGS
section. No matter what "allow_user_rules" is set to, these can never
be set from a user's "user_prefs" file.
auto_whitelist_factory module (default: Mail::SpamAssassin::DBBasedAd-
drList)
Select alternative whitelist factory module.
auto_whitelist_path /path/filename (default: ~/.spamassas-
sin/auto-whitelist)
This is the automatic-whitelist directory and filename. By
default, each user has their own whitelist database in their
"~/.spamassassin" directory with mode 0700. For system-wide Spa-
mAssassin use, you may want to share this across all users,
although that is not recommended.
auto_whitelist_db_modules Module ... (default: see below)
What database modules should be used for the auto-whitelist storage
database file. The first named module that can be loaded from the
perl include path will be used. The format is:
PreferredModuleName SecondBest ThirdBest ...
ie. a space-separated list of perl module names. The default is:
DB_File GDBM_File SDBM_File
NDBM_File is no longer supported, since it appears to have bugs
that preclude its use for the AWL (see SpamAssassin bug 4353).
auto_whitelist_file_mode (default: 0600)
The file mode bits used for the automatic-whitelist directory or
file.
Make sure you specify this using the 'x' mode bits set, as it may
also be used to create directories. However, if a file is created,
the resulting file will not have any execute bits set (the umask is
set to 111).
user_awl_dsn DBI:databasetype:databasename:hostname:port
Used by the SQLBasedAddrList storage implementation.
This will set the DSN used to connect. Example: "DBI:mysql:spamas-
sassin:localhost"
user_awl_sql_username username
Used by the SQLBasedAddrList storage implementation.
The authorized username to connect to the above DSN.
user_awl_sql_password password
Used by the SQLBasedAddrList storage implementation.
The password for the database username, for the above DSN.
user_awl_sql_table tablename
Used by the SQLBasedAddrList storage implementation.
The table user auto-whitelists are stored in, for the above DSN.
perl v5.8.8 2006-08-29Mail::SpamAssassin::Plugin::AWL(3)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:38:41 GMT 2007
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